fix: HotKeyRecorderField stays first responder after successful capture (L3)

[sfegette]

Summary

In HotKeyRecorderField.handle(_:), after Escape the view correctly calls window?.makeFirstResponder(nil). After a successful hotkey capture, however, the view stays first responder — leaving the recorder in a visually active state when the user expects it to be done.

Fix

After onCapture?(...) is called, add:

window?.makeFirstResponder(nil)

Notes

Consistent with the Escape path — the recorder should resign after any terminal event (cancel or capture).